Mastervolt Mass Combi 12/1200-60

HOW IT WORKS
3.3.4 Generator / mains support function
(selectable)
If the demand for AC power still increases, the external AC
circuit breaker may still trip if nothing is done. This problem
can be solved by the Generator / mains support function. If
the total demand for energy exceeds the maximum
external power supply, energy can be added to the AC
outputs “POWER” and “SHORT BREAK” by means of the
inverter. This appliance can be automatically connected in
parallel with the external power supply.
See figure 8
Here the AC-input is still limited to 6 Amps. This is not
enough to supply the total load (4 + 5A = 9A) connected to
the AC outputs.
When the Generator / mains support function is enabled,
the inverter will supply the remaining 9 – 6 = 3A. This
means that the restricted amount of external AC power will
be compensated by energy which is stored in the
batteries.
Later, when the AC load has dropped below the setting of
the Power sharing function again, the battery charger of
the Mass Combi will commence to recharge the batteries.
For safety reasons the transfer relay is immediately
switched off when incoming AC power fails in operation so
that there will never be a high voltage on the shore cable
inlet when it is not connected.
3.3.5 Power support function (selectable)
As explained above, when the Generator / mains support
function is enabled, the inverter will operate in parallel with
the external AC power source. This means that energy
from the batteries is added to the AC-output only. Under
no circumstance AC power from the inverter can be fed
back into the AC grid. Please mind that several countries
maintain different regulations with regard to AC-sources
operating in parallel with the AC-grid. This may mean that
in some situations the use of the Generator / mains
support function is not allowed. Please acquaint yourself
with local regulations on this issue. Never use the
Generator / mains support function if this is not allowed!
Even if the use of the Generator / mains support function
is not allowed, it is still possible to supply more energy
than the external AC sourced can deliver This can be
achieved by using the Power support function.
See figure 9
The AC-input is still limited to 6 Amps. This is not enough
to supply the total load (4 + 5A = 9A) connected to the AC
outputs.
Now when the Power support function is enabled, the
transfer relay will open. When opened, the external power
source will deliver 4A to supply the load connected to the
“POWER” output only, while the inverter will deliver 5
Amps for the load connected to the “SHORT BREAK”
output.
Please note that if the power consumption of the
“POWER” output exceeds the setting of the power support
function, the external AC fuse will still trip
If the total current from the “POWER”-output and “SHORT
BREAK”-output is less than the Power support setting
during approx. 10 minutes, the Mass Combi connects the
“SHORT BREAK” output back to the AC-input again
The charger commences charging again when the load
reduces further and the total current drops below the
Power sharing setting.
NOTE! You can either choose the Generator /
mains support function or the Power support
function, not both simultaneously.
AC INPUT
AC OUTPUT
“POWER”
Figure 8: Generator / mains
support function
AC OUTPUT
AC OUTPUT
“SHORT BREAK”
AC
DC
BATTERIES
POWER
SUPPORT
FUNCTION
4A
4A
5A
Max. 6A-AC
5A
Figure 9:
Power support function
Approx.
90A-DC
@12V
“SHORT BREAK”
AC
DC
4A
BATTERIES
GENERATOR /
MAINS SUPPORT
FUNCTION
6A
5A
Max. 6A-AC
3A
Approx.
55A-DC
@12V
12 EN / Mass Combi 12/1200-60 & 24/1200-35 / EN